duration.js

function duration (str) {
	var ret = 0, units = arguments.callee.units;
	str.replace(/(\d+)\s*(msec|sec|min|hour|day|week|month|year)s?/g, function (_, num, unit) {
		ret += +num * units[unit];
	});
	return ret * 1000;
}
duration.units = {
	sec : 1, min : 60, hour : 3600, day : 86400, week : 604800, month : 2592000, year : 31536000
};
this.duration = duration;

test.js

#!/usr/bin/env node
TAP();

var duration = require('./duration.js').duration

is(duration("1 sec"), 1000);
is(duration("1 min"), 60 * 1000);
is(duration("1 hour"), 60 * 60 * 1000);
is(duration("1 day"), 24 * 60 * 60 * 1000);
is(duration("1 week"), 7 * 24 * 60 * 60 * 1000);
is(duration("1 month"), 30 * 24 * 60 * 60 * 1000);
is(duration("1 year"), 365 * 24 * 60 * 60 * 1000);

is(duration("2 secs"), 2000);
is(duration("2 mins"), 60 * 2000);
is(duration("2 hours"), 60 * 60 * 2000);
is(duration("2 days"), 24 * 60 * 60 * 2000);
is(duration("2 weeks"), 7 * 24 * 60 * 60 * 2000);
is(duration("2 months"), 30 * 24 * 60 * 60 * 2000);
is(duration("2 years"), 365 * 24 * 60 * 60 * 2000);

is(duration("1 day, 12 hour"), (24 * 60 * 60 + 12 * 60 * 60) * 1000);
is(duration("1 day, 12 hours"), (24 * 60 * 60 + 12 * 60 * 60) * 1000);
is(duration("1 day 12 hour"), (24 * 60 * 60 + 12 * 60 * 60) * 1000);
is(duration("1 day 12 hours"), (24 * 60 * 60 + 12 * 60 * 60) * 1000);

done_testing();


function TAP () {
	var util = require('util');
	this.ok = function (bool, name) {
		done_testing.n++;
		var r = bool ? 'ok' : 'not ok';
		r += " " + done_testing.n;
		console.log(name ? r + " # " + name : r);
	};
	this.is = function (got, expected, name) {
		got = util.inspect(got, true, 2);
		expected = util.inspect(expected, true, 2);
		if (got === expected) {
			ok(true, name);
		} else {
			ok(false, name);
			console.log("# got:\n" + got.replace(/^/m, "# "));
			console.log("# expected:\n" + expected.replace(/^/m, "# "));
		}
	}
	this.done_testing = function () {
		var n = done_testing.n;
		console.log('1..' + n);
	}
	this.done_testing.n = 0;
}